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Telomere length in the parental and derived oral keratinocytes. (a) Telomere length for OKF6, OKF6-D1, OKF6-Δp53, and OKF6-D1/Δp53 (120 PDs) cells was analyzed by hybridization of genomic DNA with a specific oligonucleotide probe. OKF6-hTERT cells served as control. (b) Telomere length for OKF6-D1/Δp53 (120 PDs) and OKF6-D1/Δp53 (160 PDs) cells. Size standard is indicated at the left. The broad smear in OKF6-D1/Δp53 (160 PDs) starts at a telomere length of 40 kb.
